Lecture 11 - ANS Basic Considerations

Question 1

Describe characteristics of SNS

Origin, general/specific distribution and response, ganglion, muscles, glands controlled by SNS in orbit

Answer 1

• thoracolumbar origin
• generalized distribution and response
• Orbit:
• superior cervical ganglion
• dilator muscle
• blood vessles, uveal tract
• smooth muscles (Mueller’s)
• lacrimal glands (vessels)

Question 2

Describe characteristics of PNS

Origin, general/specific innervation, ganglion, muscles, glands controlled by SNS in orbit

Answer 2

• craniosacral origin
• specific innervation
  Orbit:
• Edinger Westphal nucleus
• CN III
• ciliary ganglion
• ciliary & sphincter muscles
• CN VII
• lacrimal gland

Question 3

What are the PNS and SNS receptors and neurotransmitters?

Answer 3

• PNS - muscarinic (Ach) post-ganglionic
• SNS - a1, a2, b1, b2 (NE and EPI) post-ganglionic
• nicotinic at neuromuscular junctional for SNS and PNS

Question 4

What type of receptor stimulates the dilator muscle?

A. a1
B. a2
C. b1
D. b2
E. muscarinic

Answer 4

A. a1

Question 5

What type of receptor stimulates the sphincter muscle?

A. a1
B. a2
C. b1
D. b2
E. muscarinic

Answer 5

E. muscarinic

Question 6

What type of receptor stimulates the ciliary body? (Pick 3)

A. a1
B. a2
C. b1
D. b2
E. muscarinic

Answer 6

B. a2
C. b1
D. b2

Question 7

What type of receptor stimulates the ciliary muscle?

A. a1
B. a2
C. b1
D. b2
E. muscarinic

Answer 7

E. muscarinic

Question 8

What type of receptor stimulates the blood vessels? (Pick 2)

A. a1
B. a2
C. b1
D. b2
E. muscarinic

Answer 8

A. a1

D. b2

Question 9

What type of receptor stimulates the lacrimal gland? (Pick 2)

A. a1
B. a2
C. b1
D. b2
E. muscarinic

Answer 9

A. a1

E. muscarinic

Question 10

What type of receptor stimulates the Mueller’s smooth muscle?

A. a1
B. a2
C. b1
D. b2
E. muscarinic

Answer 10

A. a1

Question 11

What three components of the eye are activated by muscarinic receptors? (Pick 3)

A. Dilator
B. Sphincter
C. Ciliary Muscle
D. Ciliary Body
E. Lacrimal Gland

Answer 11

B. Sphincter
C. Ciliary Muscle
E. Lacrimal Gland

Question 12

What components of the eye are NOT activated by a1 receptors?

A. Dilator
B. Ciliary Body
C. Blood Vessels
D. Meuller's Smooth Muscle
E. Lacrimal Gland (vessels)

Answer 12

B. Ciliary Body

Question 13

What components of the eye is activated by b1 or a2 receptors?

A. Dilator
B. Ciliary Body
C. Blood Vessels
D. Meuller's Smooth Muscle
E. Lacrimal Gland

Answer 13

B. Ciliary Body

Question 14

What components of the eye is activated by b2 receptors? (Pick 2)

A. Dilator
B. Ciliary Body
C. Blood Vessels
D. Meuller's Smooth Muscle
E. Lacrimal Gland

Answer 14

B. Ciliary Body

C. Blood Vessels

Question 15

What causes Horner’s what is it’s symptoms?

what neurotransmitter is lacking

Answer 15

• lack of NE in Mueller’s smooth muscle

- Causes ptosis, miosis and anhydrosis on one side of face